A control valve

Abstract

The utility model discloses a control valve, including valve stem and valve body, at least part of valve stem is located the valve cavity of valve body, define the moving direction of valve stem as first direction, control valve includes first elastic part and first pusher, control valve includes first space, along first direction, the inner wall of first space is located the space outside valve stem, the inner wall of first space includes first part and second part, and first part and second part are opposite static with valve body, at least part of first pusher and first elastic part are located first space, first pusher has third part, one end of first elastic part and first part abut, the other end of first elastic part and third part abut, and third part is located between first elastic part and second part, and third part can abut with second part, and first pusher can abut with valve stem, compared with background art, it is convenient to increase the diameter of first elastic part, and the elastic force of first elastic part is promoted.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control valves, and in particular to a control valve. Background Technology

[0002] A control valve includes a valve body, a valve stem, and a spring. At least a portion of the valve stem is located in a valve cavity of the valve body. The valve stem has a mounting cavity for mounting the spring, which is capable of pushing the valve stem to move within the valve cavity. However, in the above-described technology, when at least a portion of the spring is mounted inside the valve stem, the radial dimension of the spring is limited by the diameter of the valve stem. The diameter of the spring is small, and therefore the elastic force provided is small. Utility Model Content

[0003] This invention provides a control valve that facilitates the enhancement of elastic force.

[0004] A control valve includes a valve stem and a valve body, at least a portion of the valve stem being located in a valve cavity of the valve body, and the direction of movement of the valve stem is defined as a first direction; the control valve includes a first elastic element and a first pusher, the control valve includes a first space, along the first direction, the inner wall of the first space being located outside the valve stem, along the first direction, the inner wall of the first space includes a first part and a second part, the first part and the second part being respectively stationary relative to the valve body, along the first direction, at least a portion of the first pusher and the first elastic element are located in the first space, the first pusher has a third part, one end of the first elastic element abuts against the first part, the other end of the first elastic element abuts against the third part, along the first direction, the third part is located between the first elastic element and the second part, the third part can abut against the second part, the first pusher can abut against the valve stem, and the first pusher can be pushed by the force of the first elastic element to move the valve stem along the first direction.

[0005] The control valve of this application, by setting a first space along a first direction, with the inner wall of the first space located in the outer space of the valve stem and the first elastic element located in the first space, is easier to increase the diameter of the first elastic element and enhance the elastic force of the first elastic element compared to the prior art. Attached Figure Description

[0006] Figure 1 This is a cross-sectional structural schematic diagram of the first embodiment of this utility model; Figure 2 yes Figure 1 Enlarged structural diagram at point A; Figure 3 yes Figure 1 Enlarged structural diagram at point B; Figure 4 yes Figure 1 Enlarged structural diagram at point C; Figure 5This is a cross-sectional structural schematic diagram of the second embodiment of the present invention; Figure 6 yes Figure 5 A magnified structural diagram at point D.

[0007] Figure label: 1. Valve body; 2. First end cap; 21. First groove; 211. Second chamfer; 212. First deep groove; 213. First shallow groove; 3. Second end cap; 31. Second groove; 311. Fourth chamfer; 312. Second deep groove; 313. Second shallow groove; 4. First elastic element; 5. Second elastic element; 6. First pusher; 61. First cap body; 611. Third part; 62. First top body; 63. Third channel; 64. First protrusion; 7. Second pusher; 71. Second cap body; 711. Seventh part; 72. Second top body; 73. Fourth channel; 74. Second protrusion; 8. First fixed seat; 81. First peripheral wall portion; 82. First limiting portion; 83. First chamfer; 9. Second fixing seat; 91. Second peripheral wall portion; 92. Second limiting portion; 93. Third chamfer; 10. Valve stem; 11. First cavity; 12. Second cavity; 13. First Space; 131. First Part; 132. Second Part; 133. Fourth Part; 14. The Second Space; 141. Part Five; 142. Part Six; 143. Part Eight; 15. First passage; 16. Second Channel. Detailed Implementation

[0008] To make the objectives, technical solutions, and advantages of this utility model clearer, specific embodiments are described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0009] See Figures 1-6This utility model provides a control valve, including a valve stem 10 and a valve body 1. At least a portion of the valve stem 10 is located in the valve cavity of the valve body 1. The direction of movement of the valve stem 10 is defined as a first direction. The control valve includes a first elastic element 4 and a first pushing element 6. The control valve includes a first space 13. Along the first direction, the inner wall of the first space 13 is located in the space outside the valve stem 10. Along the first direction, the inner wall of the first space 13 includes a first part 131 and a second part 132. The first part 131 and the second part 132 are respectively stationary relative to the valve body 1. Along the first direction... At least a portion of the first push member 6 and the first elastic member 4 are located in the first space 13. The first push member 6 has a third part 611. One end of the first elastic member 4 abuts against the first part 131, and the other end of the first elastic member 4 abuts against the third part 611. Along the first direction, the third part 611 is located between the first elastic member 4 and the second part 132. The third part 611 can abut against the second part 132. The first push member 6 can abut against the valve stem 10. The first push member 6 can be pushed by the force of the first elastic member 4 to move the valve stem 10 along the first direction.

[0010] In this embodiment, the first elastic element 4 is a first spring, which is located in the first space 13. Along the first direction, the inner wall of the first space 13 is located in the space outside the valve stem 10. The selection of the first spring is not limited by the valve stem 10. The first part 131 and the second part 132 are respectively stationary relative to the valve body 1. Along the first direction, at least a part of the first pusher 6 is located in the first space 13. The first pusher 6 has a third part 611. One end of the first spring abuts against the first part 131, and the other end of the first spring abuts against the third part 611. Along the first direction, the third part 611 is located between the first spring and the second part 132. The third part 611 can abut against the second part 132. During the movement of the valve stem 10, the valve stem 10 can separate from the first pusher 6, so that the deformation of the first spring does not always change with the movement of the valve stem 10 during the movement of the valve stem 10. This avoids wear and fatigue caused by frequent changes in the deformation of the first spring, and can effectively extend the service life of the first spring. During the movement of the valve stem 10, the valve stem 10 can abut against the first push member 6 and push the first push member 6 to compress the first spring. During the process of the valve stem 10 returning to its original position, the elastic potential energy generated by the compression of the first spring can push the first push member 6. The valve stem 10 abuts against the first push member 6, and the valve stem 10 can return to its original position under the action of the first push member 6.

[0011] See Figure 1 and Figure 5The inner wall of the first space 13 includes a fourth part 133, which is located around the periphery of the first spring. Along the first direction, the fourth part 133 and the first spring are guided together, and the fourth part 133 and the valve body 1 are relatively stationary. The fourth part 133 can guide the entire first spring, reducing the possibility of the first spring shifting or twisting during deformation.

[0012] See Figure 3 and Figure 6 Along the first direction, the first pusher 6 has a first cap portion 61 and a first top portion 62. The first elastic member 4 and the first cap portion 61 are positioned between the first portion 131 and the second portion 132. A fourth portion 133 is provided to guide the first cap portion 61. The first cap portion 61 includes a third portion 611, and the first top portion 62 can abut against the valve stem 10. The fourth portion 133 guides the first cap portion 61, reducing the possibility of the first cap portion 61 deviating during movement.

[0013] See Figure 1 and Figure 5 The control valve includes a first end cap 2. Along a first direction, the valve body 1 has a first end. The first end cap 2 is fixed or limited to the first end. The first end cap 2 is fixed to the first end, which can be understood as the first end cap 2 and the first end being non-removable. For example, the first end cap 2 is welded to the first end, or fixed by other non-removable embodiments. The first end cap 2 is limited to the first end, which can be understood as a limiting setting between the first end cap 2 and the first end. For example, the first end cap 2 and the first end are interference-fitted, the first end cap 2 and the first end are limited by bolts, or other limiting methods.

[0014] See Figure 2 and Figure 6 The first end cap 2 has a first groove 21 extending in a first direction. The opening of the first groove 21 faces the valve stem 10. A first portion 131 is located on the bottom wall of the first groove 21, and at least a portion of the fourth portion 133 is located on the side wall of the first groove 21.

[0015] See Figures 1-3 In this embodiment, the control valve includes a first fixed seat 8, the first fixed seat 8 having a first peripheral wall portion 81, the first peripheral wall portion 81 extending along a first direction, the first peripheral wall portion 81 being fixed or limited to the first end cap 2, the first peripheral wall portion 81 being annular or substantially annular, a portion of the fourth part 133 being located on the groove sidewall of the first groove portion 21, a portion of the fourth part 133 being located on the inner wall of the first peripheral wall portion 81, a first cap portion 61 being located on the inner side of the first peripheral wall portion 81, and the inner walls of the first cap portion 61 and the first peripheral wall portion 81 being guided.

[0016] Along the first direction, the first fixed seat 8 and the first end cover 2 are matched in a limiting manner, which effectively plays the role of limiting.

[0017] See Figure 2 The first groove 21 is a first stepped groove, which includes a first deep groove 212 and a first shallow groove 213. Along the first direction, the first shallow groove 213 is located closer to the valve stem 10 than the first deep groove 212. The first peripheral wall 81 is fixed or limited to the groove side wall of the first shallow groove 213. A portion of the fourth part 133 is located on the groove side wall of the first deep groove 212, and a portion of the fourth part 133 is located on the inner wall of the first peripheral wall 81.

[0018] In this embodiment, the width of the first shallow groove 213 is greater than the width of the first deep groove 212 to facilitate the installation of the first fixing seat 8.

[0019] See Figure 1 and Figure 3 The first fixed base 8 has a first limiting part 82, and the second part 132 is located on the first limiting part 82. The first limiting part 82 is located on the periphery of the first top body part 62. Along the first direction, the first limiting part 82 and the first top body part 62 are guided. The first limiting part 82 plays a guiding role for the first top body part 62, reducing the possibility of the first top body part 62 deviating during movement.

[0020] Since the fourth part 133 guides the first cap part 61 and the first limiting part 82 guides the first top part 62, the movement trajectory of the first pushing member 6 can be effectively limited, and the deviation of the first pushing member 6 due to lack of constraint during movement can be avoided.

[0021] Considering that part 133 is located on the side wall of the first deep groove 212 and part 133 is located on the inner wall of the first peripheral wall 81, and that the first end cap 2 and the first fixing seat 8 are two independent components, after the first end cap 2 and the first fixing seat 8 are installed, due to the need to compensate for unavoidable tolerances during the manufacturing process, a certain gap will inevitably exist between them. During the compression of the first spring, the first spring is prone to radial deformation under force, and the first spring is prone to direct contact with the first end cap 2 and the first fixing seat 8, generating friction and affecting the service life of the first spring.

[0022] See Figure 2To avoid direct contact between the first spring and the first end cap 2 and the first fixed seat 8, the first peripheral wall portion 81 has a first chamfer 83, and the groove sidewall of the first groove portion 21 has a second chamfer 211. The first chamfer 83 is located at the end of the first peripheral wall portion 81 away from the valve stem 10, and the second chamfer 211 is located on the groove sidewall of the first deep groove portion 212 near the end of the first shallow groove portion 213. Due to the setting of the first chamfer 83 and the second chamfer 211, the activity space of the first spring during deformation is effectively expanded, and the direct contact between the first spring and the first end cap 2 and the first fixed seat 8 is reduced, thereby greatly reducing friction and wear and effectively extending the service life of the first spring.

[0023] In addition, the first chamfer 83 and the second chamfer 211 can also provide guidance for the assembly of the first spring, so that the first spring can be installed more smoothly into the preset position.

[0024] See Figures 5-6 In other embodiments, the control valve includes a first fixed seat 8 having a first peripheral wall portion 81 extending along a first direction. The first peripheral wall portion 81 is fixed or limited to the first end cap 2. The first peripheral wall portion 81 is annular or substantially annular. The fourth portion 133 may be entirely located on the groove sidewall of the first groove portion 21. The first cap portion 61 is located inside the groove sidewall of the first groove portion 21 and is guided to the groove sidewall of the first groove portion 21.

[0025] In this embodiment, the first groove 21 can be a first straight groove (the cross section of the first straight groove is uniform along the first direction and there is no step-like size change), the first cap 61 is located inside the groove sidewall of the first straight groove, and the first cap 61 and the groove sidewall of the first straight groove are guided.

[0026] See Figure 6 The first peripheral wall portion 81 is located on the periphery of the first top body portion 62. Along the first direction, the first peripheral wall portion 81 and the first top body portion 62 are guided. The first peripheral wall portion 81 plays a guiding role for the first top body portion 62, reducing the possibility of the first top body portion 62 deviating during movement.

[0027] Since the fourth part 133 guides the first cap part 61 and the first peripheral wall part 81 guides the first top part 62, the movement trajectory of the first pusher 6 can be effectively limited, and the deviation of the first pusher 6 due to lack of constraint during movement can be avoided.

[0028] In this embodiment, the fourth part 133 is entirely located on the sidewall of the first groove 21, and there is no need to additionally provide the first chamfer 83 and the second chamfer 211.

[0029] Along the first direction, the control valve has a first position in which the valve stem 10 can be parked, and along the first direction, the control valve has a first stroke position in which the valve stem 10 can be. During the process of the valve stem 10 moving from the first position to the first stroke position, the valve stem 10 has a first state and a second state. When the valve stem 10 is in the first state, the first push member 6 abuts against the valve stem 10. When the valve stem 10 is in the second state, the first push member 6 separates from the valve stem 10.

[0030] The control valve can be a solenoid valve. In this embodiment, a three-position five-way solenoid valve is used as an example. The first position is the position of the valve stem 10 when the solenoid valve is de-energized.

[0031] See Figure 1 and Figure 5 When the valve stem 10 is in the first position, the first pusher 6 abuts against the valve stem 10, and the first pusher 6 separates from the second part 132, that is, a gap is formed between the first pusher 6 and the second part 132. Specifically, it is very difficult to achieve precise abutment between the first pusher 6 and the valve stem 10, while simultaneously limiting the abutment between the first pusher 6 and the second part 132. Due to limitations in manufacturing processes and material properties, tolerances are unavoidable, but the existence of a gap can effectively compensate for manufacturing and assembly tolerances, thereby ensuring that the first pusher 6 can better abut against the valve stem 10, and that the valve stem 10 can better stop in the first position under the action of the first pusher 6.

[0032] See Figure 1 , Figure 2 and Figure 4 In this embodiment, the three-position five-way solenoid valve further includes a second elastic element 5 and a second pusher element 7. The second elastic element 5 is a second spring. The control valve includes a second space 14. Along the first direction, the inner wall of the second space 14 is located in the space outside the valve stem 10. Along the first direction, the inner wall of the second space 14 includes a fifth part 141 and a sixth part 142. The fifth part 141 and the sixth part 142 are respectively stationary relative to the valve body 1. Along the first direction, at least a portion of the second pusher element 7 and the second elastic element 5 are located in the second space 14. 4. The second pusher 7 has a seventh part 711. One end of the second elastic member 5 abuts against the fifth part 141, and the other end of the second elastic member 5 abuts against the seventh part 711. Along the first direction, the seventh part 711 is located between the second elastic member 5 and the sixth part 142. The second pusher 7 can abut against the valve stem 10. The second pusher 7 can be pushed by the force of the second elastic member 5 to move the valve stem 10 along the first direction. Along the first direction, the first pusher 6 and the second pusher 7 are located at opposite ends of the valve stem 10.

[0033] The second spring is located in the second space 14 along the first direction. The inner wall of the second space 14 is located in the space outside the valve stem 10. The selection of the second spring is not limited by the valve stem 10. The fifth part 141 and the sixth part 142 are respectively stationary relative to the valve body 1. Along the first direction, at least a portion of the second push member 7 is located in the second space 14. The second push member 7 has a seventh part 711. One end of the second spring abuts against the fifth part 141, and the other end of the first spring abuts against the seventh part 711. Along the first direction, the seventh part 711 is located between the first spring and the sixth part 142. The seventh part 711 can abut against the sixth part 142. During the movement of the valve stem 10, the valve stem 10 can separate from the second push member 7, so that the deformation of the second spring does not always change with the movement of the valve stem 10 during the movement of the valve stem 10. This avoids wear and fatigue caused by frequent changes in the deformation of the second spring, and can effectively extend the service life of the second spring. During the movement of the valve stem 10, the valve stem 10 can abut against the second push member 7 and push the second push member 7 to compress the second spring. During the process of the valve stem 10 returning to its original position, the elastic potential energy generated by the compression of the second spring can push the second push member 7, and the valve stem 10 abuts against the second push member 7. The valve stem 10 can return to its original position under the action of the second push member 7.

[0034] The inner wall of the second space 14 includes an eighth portion 143, which is located around the second spring along a first direction. The eighth portion 143 and the second spring are guided together, and the eighth portion 143 and the valve body 1 are relatively stationary. The eighth portion 143 can guide the entire second spring, reducing the possibility of the second spring shifting or twisting during deformation.

[0035] Along the first direction, the second pusher 7 has a second cap portion 71 and a second top portion 72. The second cap portion 71 includes a seventh part 711, an eighth part 143, and a guide arrangement for the second cap portion 71. The second top portion 72 can abut against the valve stem 10. The eighth part 143 guides the second cap portion 71, reducing the possibility of the second cap portion 71 deviating during movement.

[0036] The control valve includes a second end cap 3. Along a first direction, the valve body 1 has a second end. The second end cap 3 is fixed or limited to the second end. The second end cap 3 is fixed to the second end, which can be understood as the second end cap 3 and the second end being non-removable. For example, the second end cap 3 is welded to the second end, or fixed by other non-removable embodiments. The second end cap 3 is limited to the second end, which can be understood as a limiting setting between the second end cap 3 and the second end. For example, the second end cap 3 and the second end are interference-fitted, the second end cap 3 and the second end are limited by bolts, or other limiting methods.

[0037] See Figure 1 and Figure 4 The second end cap 3 has a second groove 31 that extends along a first direction. The opening of the second groove 31 faces the valve stem 10. The fifth part 141 is located on the bottom wall of the second groove 31, and at least a portion of the eighth part 143 is located on the side wall of the second groove 31.

[0038] See Figure 1 and Figure 4 In this embodiment, the control valve includes a second fixed seat 9, which has a second peripheral wall portion 91. The second peripheral wall portion 91 extends along a first direction and is fixed or limited to the second end cap 3. The second peripheral wall portion 91 is annular or substantially annular. A portion of the eighth part 143 is located on the groove sidewall of the second groove portion 31, and a portion of the eighth part 143 is located on the inner wall of the second peripheral wall portion 91. The second cap portion 71 is located inside the second peripheral wall portion 91 and is guided to the inner wall of the second peripheral wall portion 91.

[0039] Along the first direction, the second fixed seat 9 and the second end cover 3 are in a limiting engagement, effectively playing a limiting role.

[0040] See Figure 4 The second groove 31 is a second stepped groove, which includes a second deep groove 312 and a second shallow groove 313. Along the first direction, the second shallow groove 313 is located closer to the valve stem 10 than the second deep groove 312. The second peripheral wall 91 is fixed or confined to the groove sidewall of the second shallow groove 313. A portion of the eighth part 143 is located on the groove sidewall of the second deep groove 312, and a portion of the eighth part 143 is located on the inner wall of the second peripheral wall 91.

[0041] In this embodiment, the width of the second shallow groove 313 is greater than the width of the second deep groove 312, so as to facilitate the installation of the second fixing seat 9.

[0042] See Figure 1 and Figure 4 The second fixed seat 9 has a second limiting part 92, and the sixth part 142 is located on the second limiting part 92. The second limiting part 92 is located on the periphery of the second top part 72. Along the first direction, the second limiting part 92 and the second top part 72 are guided and arranged. The second limiting part 92 plays a guiding role for the second top part 72, reducing the possibility of the second top part 72 deviating during movement.

[0043] Since the eighth part 143 guides the second cap part 71 and the second limiting part 92 guides the second top part 72, the movement trajectory of the second pusher 7 can be effectively limited, and the deviation of the second pusher 7 due to lack of constraint during movement can be avoided.

[0044] Considering that part 143 is located on the side wall of the second deep groove 312 and part 143 is located on the inner wall of the second peripheral wall 91, and that the second end cap 3 and the second fixing seat 9 are two independent components, after the second end cap 3 and the second fixing seat 9 are installed, due to the need to compensate for unavoidable tolerances during the manufacturing process, a certain gap will inevitably exist between them. During the compression of the second spring, the second spring is prone to radial deformation under force, and the second spring is prone to direct contact with the second end cap 3 and the second fixing seat 9, generating friction and affecting the service life of the second spring.

[0045] See Figure 4 To prevent the second spring from directly contacting the second end cap 3 and the second fixed seat 9, the second peripheral wall portion 91 has a third chamfer 93, and the groove sidewall of the second groove portion 31 has a fourth chamfer 311. The third chamfer 93 is located at the end of the second peripheral wall portion 91 away from the valve stem 10, and the fourth chamfer 311 is located on the groove sidewall of the second deep groove portion 312 near the end of the second shallow groove portion 313. The setting of the third chamfer 93 and the fourth chamfer 311 effectively expands the activity space of the second spring when it deforms, avoids direct contact between the second spring and the second end cap 3 and the second fixed seat 9, thereby greatly reducing friction and wear, and effectively extending the service life of the second spring.

[0046] In addition, the third chamfer 93 and the fourth chamfer 311 can also provide guidance for the assembly of the second spring, so that the second spring can be installed more smoothly into the preset position.

[0047] In this embodiment, a three-position five-way solenoid valve is used as an example. Along the first direction, the control valve has a first stroke position, a second stroke position, and a first position where the valve stem 10 can be located. When the valve stem 10 is in the first position, that is, when the three-position five-way solenoid valve is in the de-energized state, the valve stem 10 is in the position where the first push member 6 and the valve stem 10 abut. The stroke of the valve stem 10 from the first position to the first stroke position is the first stroke, and the stroke of the valve stem 10 from the first position to the second stroke position is the second stroke. The first stroke and the second stroke are the same. The first elastic member 4 and the second elastic member 5 have the same specifications. When the valve stem 10 is in the first position, the compression amount of the first elastic member 4 and the second elastic member 5 is the same.

[0048] The three-position five-way solenoid valve can have a first chamber 11, the chamber wall of which includes the end wall of the valve stem 10 along a first direction. In the embodiment, the first chamber 11 is located between the first fixed seat 8 and the valve stem 10. The three-position five-way solenoid valve has a first channel 15, which is connected to the first chamber 11. The first channel 15 is used to vent air to the first chamber 11.

[0049] Along the first direction, the first pusher 6 has a through third channel 63. During the compression process of the first spring, excess gas in the first space 13 is discharged into the first cavity 11 through the third channel 63.

[0050] The three-position five-way solenoid valve can have a second chamber 12, the wall of which includes the end wall of the valve stem 10 along a first direction. In the embodiment, the second chamber 12 is located between the second fixed seat 9 and the valve stem 10. The three-position five-way solenoid valve has a second channel 16, which is connected to the second chamber 12. The second channel 16 is used to vent air to the second chamber 12.

[0051] Along the first direction, the second pusher 7 has a through fourth channel 73. During the compression process of the second spring, excess gas in the second space 14 is discharged into the second cavity 12 through the fourth channel 73.

[0052] When the first chamber 11 is vented and the second chamber 12 is not vented, the valve stem 10 moves to the first stroke position. When the second chamber 12 is vented and the first chamber 11 is not vented, the valve stem 10 moves to the second stroke position. When neither the second chamber 12 nor the first chamber 11 is vented, the valve stem 10 moves to the first position.

[0053] When the valve stem 10 is in the first position, the first pusher 6 can press against the valve stem 10 under the action of the first spring, and the second pusher 7 can press against the valve stem 10 under the action of the second spring. At this time, the first spring is in a compressed state, and the second spring is in a compressed state. Since the first stroke and the second stroke are the same, the specifications of the first spring and the second spring are the same, and the compression of the first spring and the second spring is the same, the forces at both ends of the valve stem 10 are balanced. At this time, a gap is formed between the third part 611 and the second part 132, and a gap is formed between the seventh part 711 and the sixth part 142, which makes it easier for the valve stem 10 to return to the first position under the action of the first pusher 6 and the second pusher 7. That is, in the power-off state, it is more conducive to the valve stem 10 to reset and return to the correct position under the action of the first pusher 6 and the second pusher 7.

[0054] When the valve stem 10 moves from the first position toward the first stroke position, the first spring can push the first push member 6, so that the gap between the third part 611 and the second part 132 gradually decreases until the third part 611 and the second part 132 are in contact limit. At the same time, the valve stem 10 can push the second push member 7 to compress the second spring, so that the gap between the seventh part 711 and the sixth part 142 gradually increases. During this stage, the first push member 6 abuts against the valve stem 10, and the second push member 7 abuts against the valve stem 10.

[0055] When the third part 611 abuts against the second part 132, and the valve stem 10 continues to move towards the first stroke position under the action of gas, the first pusher 6 separates from the valve stem 10. The first spring no longer undergoes further deformation with the movement of the valve stem 10. At the same time, the valve stem 10 can further push the second pusher 7 to compress the second spring under the action of gas, thereby further increasing the gap between the seventh part 711 and the sixth part 142. During this process, including the separation of the valve stem 10 from the first pusher 6, the first spring does not undergo further deformation; that is, the deformation of the first spring does not change.

[0056] When the valve stem 10 moves from the first stroke position toward the first position, the second pusher 7, under the action of the second spring, pushes the valve stem 10 back to its original position, so that the gap between the seventh part 711 and the sixth part 142 gradually decreases. When the valve stem 10 returns to the first position, the first pusher 6 abuts against the valve stem 10 again.

[0057] When the valve stem 10 moves from the first position toward the second stroke position, the second spring can push the second push member 7, so that the gap between the seventh part 711 and the sixth part 142 gradually decreases until the seventh part 711 and the sixth part 142 are in contact limit. At the same time, the valve stem 10 can push the first push member 6 to compress the first spring, so that the gap between the third part 611 and the second part 132 gradually increases. During this stage, the first push member 6 abuts against the valve stem 10, and the second push member 7 abuts against the valve stem 10.

[0058] When the seventh part 711 is limited by the sixth part 142, and the valve stem 10 continues to move towards the second stroke position under the action of gas, the second pusher 7 separates from the valve stem 10. The second spring no longer undergoes further deformation with the movement of the valve stem 10. At the same time, the valve stem 10 can further push the first pusher 6 to compress the first spring under the action of gas, thereby further increasing the gap between the third part 611 and the second part 132. During this process, including the separation of the valve stem 10 from the second pusher 7, the second spring does not undergo further deformation; that is, the deformation of the second spring does not change.

[0059] When the valve stem 10 moves from the second stroke position toward the first position, the first pusher 6, under the action of the first spring, pushes the valve stem 10 back to its original position, so that the gap between the third part 611 and the second part 132 gradually decreases. When the valve stem 10 returns to the first position, the second pusher 7 abuts against the valve stem 10 again.

[0060] During the movement of the valve stem 10, the first spring and the second spring do not change their deformation throughout the entire movement of the valve stem 10. This avoids wear and fatigue caused by frequent changes in the deformation of the first spring and the second spring, and can effectively extend the service life of the first spring and the second spring.

[0061] See Figure 1 and Figure 5 The first cap body 61 has a first protrusion 64 at the end near the first spring, and part of the first spring is sleeved on the first protrusion 64, which can support and guide the first spring.

[0062] See Figure 1 , Figure 4 and Figure 5 The second cap portion 71 has a second protrusion 74 at one end near the second spring, and the second spring sleeve portion is located on the second protrusion 74, which can support and guide the second spring.

[0063] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A control valve comprising a valve stem (10) and a valve body (1), wherein at least a portion of the valve stem (10) is located in a valve cavity of the valve body (1), characterized in that, The direction of movement of the valve stem (10) is defined as the first direction; the control valve includes a first elastic element (4) and a first pusher (6), the control valve includes a first space (13), along the first direction, the inner wall of the first space (13) is located in the space outside the valve stem (10), along the first direction, the inner wall of the first space (13) includes a first part (131) and a second part (132), the first part (131) and the second part (132) are respectively stationary relative to the valve body (1), along the first direction, at least a portion of the first pusher (6) and the first elastic element (4) are located in the first space (13). The first pusher (6) has a third part (611), one end of the first elastic member (4) abuts against the first part (131), the other end of the first elastic member (4) abuts against the third part (611), the third part (611) is located between the first elastic member (4) and the second part (132) along the first direction, the third part (611) can abut against the second part (132), the first pusher (6) can abut against the valve stem (10), and the first pusher (6) can be pushed by the force of the first elastic member (4) to move the valve stem (10) along the first direction.

2. The control valve according to claim 1, characterized in that, The inner wall of the first space (13) includes a fourth part (133), which is located on the periphery of the first elastic member (4). Along the first direction, the fourth part (133) and the first elastic member (4) are guided and arranged, and the fourth part (133) and the valve body (1) are relatively stationary.

3. The control valve according to claim 2, characterized in that, Along the first direction, the first pusher (6) has a first cap portion (61) and a first top portion (62), the fourth portion (133) and the first cap portion (61) are guided together, the first cap portion (61) includes the third portion (611), and the first top portion (62) is capable of abutting against the valve stem (10).

4. The control valve according to claim 2 or 3, characterized in that, The control valve includes a first end cap (2), the valve body (1) has a first end along the first direction, the first end cap (2) is fixed or limited to the first end, the first end cap (2) has a first groove (21), the first groove (21) extends along the first direction, the opening of the first groove (21) faces the valve stem (10), the first portion (131) is located on the bottom wall of the first groove (21), and at least a portion of the fourth portion (133) is located on the side wall of the first groove (21).

5. The control valve according to claim 4, characterized in that, The control valve includes a first fixed seat (8) having a first peripheral wall portion (81) extending in a first direction. The first peripheral wall portion (81) is fixed or limited to the first end cap (2). The first peripheral wall portion (81) is annular or substantially annular. A portion of the fourth part (133) is located on the groove sidewall of the first groove portion (21). A portion of the fourth part (133) is located on the inner wall of the first peripheral wall portion (81). The first cap portion (61) is located inside the first peripheral wall portion (81). The inner walls of the first cap portion (61) and the first peripheral wall portion (81) are guided.

6. The control valve according to claim 5, characterized in that, The first fixing seat (8) has a first limiting part (82), the second part (132) is located on the first limiting part (82), the first limiting part (82) is located on the periphery of the first top body part (62), and the first limiting part (82) and the first top body part (62) are guided along the first direction.

7. The control valve according to any one of claims 1-6, characterized in that, Along the first direction, the control valve has a first position in which the valve stem (10) can be stopped. When the valve stem (10) is in the first position, the first pusher (6) and the valve stem (10) abut against each other, and the third part (611) separates from the second part (132).

8. The control valve according to claim 7, characterized in that, Along the first direction, the control valve has a first stroke position in which the valve stem (10) can be located. During the movement of the valve stem (10) from the first position toward the first stroke position, the valve stem (10) has a first state and a second state. When the valve stem (10) is in the first state, the first pusher (6) and the valve stem (10) abut against each other. When the valve stem (10) is in the second state, the first pusher (6) and the valve stem (10) separate.

9. The control valve according to any one of claims 1 to 6, characterized in that, The control valve includes a second elastic element (5) and a second pusher (7). The control valve includes a second space (14). Along the first direction, the inner wall of the second space (14) is located outside the valve stem (10). Along the first direction, the inner wall of the second space (14) includes a fifth part (141) and a sixth part (142). The fifth part (141) and the sixth part (142) are respectively stationary relative to the valve body (1). Along the first direction, at least a portion of the second pusher (7) and the second elastic element (5) are located in the second space (14). 7) It has a seventh part (711), one end of the second elastic member (5) abuts against the fifth part (141), the other end of the second elastic member (5) abuts against the seventh part (711), the seventh part (711) is located between the second elastic member (5) and the sixth part (142) along the first direction, the seventh part (711) can abut against the sixth part (142), the second push member (7) can abut against the valve stem (10), and the second push member (7) can be pushed by the force of the second elastic member (5) to move the valve stem (10) along the first direction; Along the first direction, the first pusher (6) and the second pusher (7) are located at opposite ends of the valve stem (10).

10. The control valve according to claim 9, characterized in that, Along the first direction, the control valve has a first stroke position, a second stroke position, and a first position in which the valve stem (10) can be located. When the valve stem (10) is located in the first position, the first push member (6) and the valve stem (10) abut against each other. The stroke of the valve stem (10) from the first position to the first stroke position is the first stroke. The stroke of the valve stem (10) from the first position to the second stroke position is the second stroke. The first stroke and the second stroke are the same. The first elastic member (4) and the second elastic member (5) have the same specifications. When the valve stem (10) is located in the first position, the compression amount of the first elastic member (4) and the second elastic member (5) is the same.

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